In Existing system they have proposed for regression
testing using agent and also developed many testing
tool. But regression testing process has somewhat
trouble using for this tool. Here we used selection
algorithm Technique will do the following. First, it
identifies the variables which are really affected in
this execution. It determines whether a test case
contains at least one modified function and at least
one of behavior-affected functions, which can be
reached from. If they do, they will be put into the
retest test suite. This selection algorithm will
eliminate more test cases from the retest test pool, so
it more precise. So the algorithm reserves the
safeness also. This algorithm provides less efficient
to test the application and increase in cost.